34results about How to "Reduce the likelihood of aggregation" patented technology

The invention discloses a hyperbranched resin pigment dispersant. The hyperbranched resin pigment dispersant possesses a hyperbranched structure, and following functional groups: a, hydroxyl; b, oxethyl (-OC2H4-), and c, hydrophobic carbon chains containing 5 to 18 carbon atoms. The hyperbranched resin pigment dispersant is capable of separating and dispersing pigments, strong anchoring effect with pigment can be achieved, compatibility of pigment with main resin is improved, color paste paint forming stability is improved, chromatic aberration is reduced, and the hyperbranched resin pigment dispersant can be applied to aqueous systems.

The invention discloses a CHA molecular sieve, a synthesis method thereof, and a denitration SCR catalyst synthesized by using the CHA molecular sieve. In the CHA molecular sieve, the molar ratio of silicon dioxide to aluminum oxide ranges from 5 to 75, the grain size ranges from 0.3 micrometer to 2 micrometers, after CHA molecular sieve raw powder is subjected to saturated steam treatment at thetemperature of 600 DEG C to 850 DEG C, tetra-coordinated aluminum accounts for more than or equal to 92 percent of the total aluminum amount, and the hexa-coordinate aluminum accounts for less than orequal to 8% of the total aluminum amount. The synthesis method comprises the step of synthesizing by using a composite organic template agent formed by a quaternary ammonium onium compound containingtetrahydronaphthalene or decahydronaphthalene groups and an N, N, N-dimethyl ethyl cyclohexyl quaternary ammonium onium compound. The molecular sieve disclosed by the invention has high hydrothermalstability under the condition of not having a large grain diameter, and the SCR catalyst disclosed by the invention also shows high nitrogen oxide reduction characteristics after being exposed at hightemperature and high humidity, and particularly shows high nitrogen oxide reduction characteristics in a temperature range of 200-550 DEG C.

The invention belongs to the chemical synthesis technology field, particularly relates to a temperature-sensitive poly(N-isopropylacrylamide) monomer preparing method. The method comprises steps of: (1) respectively adding isopropyl amine and acryloyl chloride into ethyl acetate solvent; (2) adding sollution of acryloyl chloride and ethyl acetate into sollution of isopropyl amine and ethyl acetate to perform synthesis reaction; (3) after the synthesis reaction, filtering to obtain isopropyl amine hydrochloride solution; (4) adding inhibitors; (5) rotating and vaporizing the sollution to remove ethyl acetate solvent, obataining crude products of N-isopropylacrylamide; (6) adding the extraction agent n-hexane, cooling to obtain white crystal N-isopropylacrylamide monomer; (7) vacuum-drying to obain N-isopropylacrylamide monomer products. The invention is free of strong acid, the feeding sequence is simple, the reaction temperature is easy to control, the subsequent separation and purification operation is simple. The invention also has the advantages of small by-products, good selectivety, simple process, high yield and low cost.

The invention discloses a method for reducing a dicyandiamide content in a solution containing 30% of cyanamide. Process of the related solution containing 30% of cyanamide comprises steps of: controlling a synthetic reaction temperature in a range of 25.0-27.0 DEG C, a PH value in a range of 6.5-7.0, and a reaction time in a range of 5.0-6.0 h; performing heat preservation after a synthetic reaction is over for 1.0-1.5 h; and obtaining the solution containing 30% of cyanamide, with the dicyandiamide content controlled to be no more than 0.5%. Raw materials required in the process comprise calcium cyanamide, carbon dioxide, and water. The method is simple in operation steps, and the reaction yield is more than 95.0%. The process is reasonable and reliable, and the product is stable in quality.

The present invention discloses an amine modified hyper-branched hydroxyl polymer, and applications of the amine modified hyper-branched hydroxyl polymer in a coating material rapid drying and pigment dispersion system. According to the present invention, the amine modified hyper-branched hydroxyl polymer resin is introduced into the coating material composition, such that the paint film drying time can be shortened, the cross-linking density of the coating can be improved, and the hardness, the scrub resistance and the chemical corrosion resistance of the paint film can be increased; with the application of the amine modified hyper-branched resin in the pigment paste system, the pigment can be effectively infiltrated and dispersed, and the fineness requirement can be met after grinding for a short time; and with the application of the pigment paste system containing the amine modified hyper-branched resin in the finished product paint, the hardness is high, the thermal storage stability and the room temperature storage stability are good, and the precipitation and the flooding of the finished product paint can be effectively slowed.

The invention discloses a high-concentration general color paste which comprises the following components in parts by weight: 30-60 parts of polyester modified acrylic resin, 3-15 parts of a dispersant, 0-1 part of an optional dispersing aid, 10-50 parts of a pigment, and 10-50 parts of an organic solvent. The color paste is universally used in various general industrial coatings, and the obtainedcoating is good in wettability, moderate in viscosity, environment-friendly and good in color development property and stability. The invention also discloses a preparation method and application ofthe color paste.

The invention relates to the technical field of construction, in particular to a concrete pouring process for a multi-layer beam slab outer eave structure. The concrete pouring process comprises the following steps: pouring stone-reducing mortar onto the bottom of a supporting column; pouring concrete with a strength grade of C40 into the supporting column; pouring concrete with a strength grade of C40 for a flat support beam from the supporting column; pouring concrete with a strength grade of C40 for the cantilever part of a wing angle beam from the supporting column; pouring concrete with astrength grade of C40 for the wing angle beam from an outerside square column; pouring concrete with a strength grade of C40 for the wing angle beam from the supporting column; pouring concrete witha strength grade of C30 for an inside beam of a flat beam from the supporting column; pouring concrete with a strength grade of C30 for the flat beam and a horizontal cross beam from the supporting column. Through providing the concrete pouring process for the multi-layer beam slab outer eave structure, the problem of concrete pouring by strength in the presence of the cantilever beam is effectively solved.

The invention discloses a synthesis method of alkyl (meth) acrylate, and belongs to the field of organic chemical synthesis. The synthesis method comprises the following steps: putting a heterogeneous solid acid catalyst, a polymerization inhibitor and (methyl) acrylic acid into a reaction kettle, heating to 50-90 DEG C, and introducing epoxide into the reaction kettle for reaction; and after the reaction is finished, preserving heat and curing, filtering reaction liquid to remove the heterogeneous solid acid catalyst, and rectifying to obtain a target product. The synthesis method provided by the invention not only can improve the selectivity of the target product alkyl (meth) acrylate, but also can effectively inhibit the generation of a by-product high-boiling-point diester generated by addition of bis (meth) acrylic acid, effectively ensures the product quality, reduces the material loss caused by polymerization in the subsequent purification process, and reduces the potential safety hazard.

The invention provides a shell body, a main reducer provided with the same and a vehicle. The shell body comprises an outer shell and a blocking structure; a main cavity, a decompression passage and adecompression hole are formed in the outer shell; the decompression passage and the decompression hole communicate with the main cavity respectively and the decompression passage communicates with the decompression hole; the blocking structure comprises an enclosure bulkhead and at least one oil blocking plate; the enclosure bulkhead is attached to the inside of the outer shell; the enclosure bulkhead and the outer shell jointly limit to form a blocking cavity; the blocking cavity is positioned between an outlet of the decompression passage and the decompression hole; and the oil blocking plate is positioned in the blocking cavity and is attached to the outer shell, so the blocking cavity is divided into at least two blocking subcavities which communicate with each other. The blocking mechanism improves the effect of blocking oil liquid and prevents the oil liquid from passing through and reaching the position of a one-way valve positioned in the decompression hole, so the problems ofoil impregnation and oil leakage at the position of the one-way valve are finally solved.

A composition comprising a protein and a polyalkoxy fatty acyl surfactant of general formula I (I) wherein R1-C(=O) is a fatty acyl group, R2 is H or a substituted or unsubstituted hydrocarbyl group, X1 is O or NH, X2 is O or NH, n is 0 or an integer of 1-5, R3 is a polymeric group comprising polymerized units of general formula II and III (II) (III) wherein the weight ratio of said protein to said polyalkoxy fatty acyl surfactant is in the range of 200:1 to 1000:1.

The invention discloses a bio-based UV light-induced viscosity-reducing pressure-sensitive adhesive and a preparation method thereof. The UV light induced viscosity-reducing pressure-sensitive adhesive is prepared from the following components in parts by weight: 19.02 to 44.38 parts of oleic acid, 14.26 to 33.26 parts of lauryl methacrylate, 2.84 to 6.63 parts of tetrahydrofurfuryl methacrylate, 5.69 to 13.27 parts of itaconic acid, 5.69 to 13.27 parts of N-hydroxymethyl acrylamide, 178.99 to 417.64 parts of a first solvent, 0.48 to 1.12 parts of a thermal initiator, 1.76 to 4.11 parts of a first catalyst, 71.28 to 166.31 parts of rosin, 35.24 to 42.94 parts of polyol, 196.82 to 232.95 parts of diisocyanate, 0.47 to 0.51 part of a second catalyst, 97.48 to 97.51 parts of a second solvent, 2.01 parts of a polymerization inhibitor, 129.42 to 164.72 parts of hydroxyl acrylate, and 30 parts of a photoinitiator. The UV light-induced viscosity-reducing pressure-sensitive adhesive is synthesized by utilizing the biomass-based monomer and rosin, and is green and environment-friendly. Meanwhile, the prepared pressure-sensitive adhesive has relatively strong adhesive strength before illumination, the peel strength is sharply reduced after illumination, and the pressure-sensitive adhesive has a wide application prospect in the fields of semiconductor chip processing and manufacturing and the like.

An aqueous writing, marking and/or drawing liquid is configured for capillary systems, more particularly for applicator implements having a capillary system. The liquid has a viscosity of less than 50 mPas, more particularly less than 20 mPas (Brookfield, 20° C., cone-plate CPE-40). The liquid contains a wetting agent, graphite having a carbon content of between 95 and 99.9 wt %, an ash content of between 0.1 and 5 wt %, and a particle size ≤20 μm at D90, and at least one release agent, more particularly in a concentration of 2 to 15 wt %. The release agent contains barium sulfate and/or an aqueous, highly mobile, nonsedimenting colloidal dispersion of nanoparticulate silicon dioxide particles.

The invention discloses a monitoring security system for a school. The monitoring security system comprises a first sign-in machine, a second sign-in machine, a camera, a control device, a first protective door and a second protective door, wherein the first sign-in machine generates a first sign-in signal according to sign-in success information; the second sign-in machine generates a second sign-in signal according to the sign-in success information; the camera is used for photographing and generating an image signal; the control device generates a first instruction according to the receivedsecond sign-in signal and the received first sign-in signal, and generates a second instruction according to the first instruction and the image signal; the first protective door is opened after receiving the first instruction; and the second protective door is opened after receiving the second instruction. Through the arrangement, when a parent picks up a child, dual authentication is carried out, and face authentication is included, so that the possibility that the child is taken away by a human dealer is effectively reduced, and the personal safety of the child is ensured; and the waitingtime of the parent and the child is shortened, and the practicability of the monitoring security system is improved.